#21 <- Feat: Add config for px-to-rem conversion

[nmn]

Add a new config option to control the automatic conversion of px values for font-size to rem.

The default value is true for backwards compatibility and because it is an a11y best practice.

[github-actions]

compressed-size: runtime library

Size change: 0.00 kB
Total size: 2.36 kB

View unchanged

Filename: gzip (minify)	kB size	kB change	% change
./packages/stylex/lib/stylex.js	1.02 (3.53)	0.00 (0.00)	0.0% (0.0%)
./packages/stylex/lib/StyleXSheet.js	1.34 (3.41)	0.00 (0.00)	0.0% (0.0%)

[github-actions]

compressed-size: e2e bundles

Size change: 0.00 kB
Total size: 1119.56 kB

View unchanged

Filename: gzip (minify)	kB size	kB change	% change
./apps/rollup-example/.build/bundle.js	1005.35 (9859.61)	0.00 (0.00)	0.0% (0.0%)
./apps/rollup-example/.build/stylex.css	114.22 (456.05)	0.00 (0.00)	0.0% (0.0%)

[necolas]

The default value is true for backwards compatibility and because it is an a11y best practice.

I want to make the case for it being false by default outside of Meta:

1. All modern browsers scale px-based font-size when zooming.
2. There's no way to opt-out of true in the cases where px is required.
3. People will not expect px to be transformed, and will probably get confused.

[nmn]

1. All modern browsers scale px-based font-size when zooming.

The a11y usecase is to be able to change font size without zooming the entire UI.

2 & 3 are good points and sufficient to convince me.

I will add an additional PR to change the default.